diff --git a/reference/intl/grapheme/grapheme-strripos.xml b/reference/intl/grapheme/grapheme-strripos.xml
index 8de59da8ad98..700cde442f29 100644
--- a/reference/intl/grapheme/grapheme-strripos.xml
+++ b/reference/intl/grapheme/grapheme-strripos.xml
@@ -48,6 +48,9 @@
The position returned is still relative to the beginning of haystack
regardless of the value of offset.
+
+ The optional offset parameter allows you to specify where in haystack to start searching as an offset in grapheme units (not bytes or characters). If the offset is negative, it is treated relative to the end of the string. The position returned is still relative to the beginning of haystack regardless of the value of offset. The search is performed right to left, searching for the first occurrence of needle from the selected grapheme cluster.
+
diff --git a/reference/intl/grapheme/grapheme-strrpos.xml b/reference/intl/grapheme/grapheme-strrpos.xml
index b83dc627a224..187601f87b8b 100644
--- a/reference/intl/grapheme/grapheme-strrpos.xml
+++ b/reference/intl/grapheme/grapheme-strrpos.xml
@@ -48,6 +48,9 @@
The position returned is still relative to the beginning of haystack
regardless of the value of offset.
+
+ The optional offset parameter allows you to specify where in haystack to start searching as an offset in grapheme units (not bytes or characters). If the offset is negative, it is treated relative to the end of the string. The position returned is still relative to the beginning of haystack regardless of the value of offset. The search is performed right to left, searching for the first occurrence of needle from the selected grapheme cluster.
+